MESON Chess Problem Database

Problem Display
PID: 186833 (5K2/8/8/4kB2/1P1N4/8/Q7/4B3 w - - 0 1)

Nikitin, Vladimir V

Freie Presse, 2000

(First published on Fri Jul 28 2000)

5K2/8/8/4kB2/1P1N4/8/Q7/4B3

#2

6 + 1

15391 Problemschach-Jahrbuch (2000) 2001
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Bg3#
  • Tries
    • 1.Bd2?
      • 1...Kd6
        • 2.Bf4#
      • 1...Kf6
        • 2.Qe6#
      • 1...Kxd4!
    • 1.Qe6+?
      • 1...Kxd4
        • 2.Qe4#
      • 1...Kf4!
    • 1.Qg8?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kd6
        • 2.Bg3#
      • 1...Kf6
        • 2.Qg7#
      • 1...Kxd4!
    • 1.Qa5+?
      • 1...Kxd4
        • 2.Qc5#
      • 1...Kd6
        • 2.Bg3#
        • 2.Qc5#
      • 1...Kf6
        • 2.Bh4#
      • 1...Kf4!
    • 1.Qa7?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Qe7#
        • 2.Qg7#
      • 1...Kf4!
  • Keys
    • 1.Qg2!
      • 1...Kxd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qg3#
      • 1...Kd6
        • 2.Bg3#
      • 1...Kf6
        • 2.Qg7#

Anticipated by 10692(1967), 219856(1974)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(A)
  • Tries
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(A)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(D)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAB1(B)
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT,XS(D)::QAR1(B)
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);S_FLIGHT::B(A)
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